15th Amendment adopted. (2013). The History Channel website. Retrieved 7:03, May 23, 2013, from http://www.history.com/this-day-in-history/15th-amendment-adopted.
15th Amendment adopted. [Internet]. 2013. The History Channel website. Available from: http://www.history.com/this-day-in-history/15th-amendment-adopted [Accessed 23 May 2013].
“15th Amendment adopted.” 2013. The History Channel website. May 23 2013, 7:03 http://www.history.com/this-day-in-history/15th-amendment-adopted.
“15th Amendment adopted,” The History Channel website, 2013, http://www.history.com/this-day-in-history/15th-amendment-adopted [accessed May 23, 2013].
“15th Amendment adopted,” The History Channel website, http://www.history.com/this-day-in-history/15th-amendment-adopted (accessed May 23, 2013).
15th Amendment adopted [Internet]. The History Channel website; 2013 [cited 2013 May 23] Available from: http://www.history.com/this-day-in-history/15th-amendment-adopted.
15th Amendment adopted, http://www.history.com/this-day-in-history/15th-amendment-adopted (last visited May 23, 2013).
15th Amendment adopted. The History Channel website. 2013. Available at: http://www.history.com/this-day-in-history/15th-amendment-adopted. Accessed May 23, 2013.